/Engine/Source/Editor/Kismet/Public/BPVariableDragDropAction.h
DragDropAction class for dropping a Variable onto a graph
class FKismetVariableDragDropAction : public [FMyBlueprintItemDragDropAction](API\Editor\Kismet\FMyBlueprintItemDragDropAction)
FName
VariableName
Name of variable being dragged
TWeakObjectPtr<...
VariableSource
Scope this variable belongs to